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| author | Laurent Vivier <lvivier@redhat.com> | 2016-05-09 15:24:59 +0200 |
|---|---|---|
| committer | Michael Tokarev <mjt@tls.msk.ru> | 2016-06-07 18:02:49 +0300 |
| commit | a2c5eaf7a9f6172e8dc5cfeb283e086f592cf50a (patch) | |
| tree | dbf04fabd9084c6baec5bc087a90e98142682f32 /hw | |
| parent | c00dc6750f6e825df27aa20fce713a55a4032cc6 (diff) | |
| download | qemu-a2c5eaf7a9f6172e8dc5cfeb283e086f592cf50a.zip | |
ppc: Remove a potential overflow in muldiv64()
The coccinelle script:
scripts/coccinelle/overflow_muldiv64.cocci
gives us a list of potential overflows in muldiv64()
(the two first parameters are 64bit values).
This patch fixes one, as the fix seems obvious:
replace muldiv64(a, b, c) by muldiv64(b, a, c)
as "a" and "b" are 64bit values but a <= NANOSECONDS_PER_SECOND.
(10^9 -> 30bit value).
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/ppc/ppc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/ppc/ppc.c b/hw/ppc/ppc.c index cdf9f258ae..1bcf740f0e 100644 --- a/hw/ppc/ppc.c +++ b/hw/ppc/ppc.c @@ -880,7 +880,7 @@ static int timebase_post_load(void *opaque, int version_id) host_ns = qemu_clock_get_ns(QEMU_CLOCK_HOST); ns_diff = MAX(0, host_ns - tb_remote->time_of_the_day_ns); migration_duration_ns = MIN(NANOSECONDS_PER_SECOND, ns_diff); - migration_duration_tb = muldiv64(migration_duration_ns, freq, + migration_duration_tb = muldiv64(freq, migration_duration_ns, NANOSECONDS_PER_SECOND); guest_tb = tb_remote->guest_timebase + MIN(0, migration_duration_tb); |